Removal of dead skin can be done through salicylic acid, retinoic acid, and fruit acid peels. 1. Salicylic acid: Salicylic acid is a keratin softener, which can dissolve keratin, but the concentration should be paid attention to when using it, and patients need to use it under the guidance of doctors. 2. Vitamin A acid: Vitamin A acid can regulate the mitosis and renewal of epidermal cells and promote normal keratinization, which can promote the exfoliation of the stratum corneum. 3. Fruit acid peeling: Fruit acid peeling is a kind of medical cosmetic program, through the use of a certain concentration of fruit acid, to achieve the purpose of exfoliation of aging skin and improve skin problems. Allergic to chemicals, facial wounds, recent surgery, pregnant women and other groups can not be carried out. Patients can first go to the dermatology or medical aesthetics department of a regular hospital for a consultation to determine their skin problems and improve them under the guidance of a doctor.